Portable forge



C. H AMMBL'MANN.

PORTABLE FORGE.

No. 410.161. Patented sept. s, 1889.

(No Model.)

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`UNTTED STATES PATENT OFFICE;

CHARLES HAMMELlVIANN, OF BUFFALO, NEV YORK.

PORTABLE FO RG E.

SPECIFICATION forming part of Letters Patent No. 410,161,V datedSeptember 3, 1889. Application filed December 18, 1888. Serial No.293,939. (No nibdel.)

To all wir/om, t may concern:

Be it known that I, CHARLES HAMMELMANN, a citizen of the United States,and a resident of Buffalo, inthe county of Erie and State of New York,have invented new and useful Improvements in Portable Forges, of whichthe following is a specification.

which tends to draw the gases from the hearth' into the bellows, andfrequently results in the destruction of the bellows by the explosion ofthe gas conned therein.

The object of my invention is to overcome this objection by providingmeans whereby the gas is effectually prevented from being drawn into thebellows; also, to construct the tuyere in such manner that the blastwill be utilized for cleaning the tuyere, so as to avoid cloggingthereof, and, finally, to simplify the connections forming the passagebetween the bellows and the tuyere.

In the accompanying drawings, Figure l is a sectional elevation of aportable forge provided with my improvements. Fig. 2 is a horizontalsection thereof7 taken above the tuyere. Fig.l 3 is a horizontal sectionof the tu yere and the casing connected therewith containing thecheck-valve. Fig. 4 is a vertical crossa section in line Qc, Fig. l, onan enlarged scale.

Like letters of reference' refer to like parts in the several figures.

A represents the upright cylindrical casin inclosing the parts of theforge.

B is the upright bellows arranged within the casing A, and havingmovable top and bottom plates b b and a central stationary Vplate orpartition b2, which is secured to the casing A, as shown. The centraland bottom plates b b2 are provided with air-openings c, which areclosed by upwardly-swin ging clapvalves c in the usual manner.

E isthe hearth or fire-pan secured withinV the upper portion of thecasing A, above the bellows; and F is the tuyere arranged cen-` trallyupon the hearth and connected with the upper compartment of the bellowsby a blast-pipe4 G, which consists of an upright section g and twohorizontal sections g g2.

7L is a horizontal valve-casing arranged on one side of the tuyere F,communicating at its inner portion withthe latter by a passage h andconnected at its outer end to the hori-` zontal section g' of theblast-pipe, the outer end of the valve-casing being provided with aninternal screw-thread, with which the eX- ternal thread of the section gengages.

t represents a spherical check-valve arranged within the casing 7L andadapted to close against the adjacent end of the section g of theblast-pipe. The check-valve c' rests in an inclined groove or way t',which slopes toward the end of the pipe-section g', so that the valvewill tend to move against the end of said pipe by gravity. The movementof the check-valve is limited in one direction by the end of the pipe gand in the other direction by stop-pins t2, formed inside of thevalvecasing. Upon forcing a blast of air through the blastpipe G` thecheck-valvei is moved away from the end of the pipe g and permits theblast to pass onward to and through the tuyere; but as soon as the blastceases the valve rolls down the incline vl against the open end of thepipe g and closes the latter, thereby preventing the suction which iscreated within the bellows during the period that the hand-lever is heldin a depressed position from drawing the gases from the hearth andtuyere back into the bellows through the blast-pipe and endangering thesafety of lthe bellows. The valve-casing vl is preferably madeconsiderably larger than the pipe g', so as to afford a wide and amplepassage for the blast around the check-valve. The-lower horizontalsection g2 of the blast pipe passes through an opening formed in theleather or flexible portion of the bellows, and is secured at its innerportion to the upper side of the partition-plate h2 by a metallic strapj, the pipe being secured to the'bow of said strap by a rivet orotherwise, so as to be held against turning. A block of wood Zt isfitted over the strap j and the inner portion of the pipe g2, and issecured to the upper side of the partition-plate b2. This block forms asupport to which the flexible portion of the bellows surrounding theopening through which the pipe g passes may be tacked, so as to form areliable air-tight joint around said pipe, and which would not bepossible in the absence of the block The lower horizontal pipe-sectiong2 is connected to the lower end of the upright section g, preferably bya T Z, the lower end of which is closed by a screw-plug Z, so thatany'asles or sediment accumulating thereinV ma y be removed. The upperhorizontal pipesection g is connected with the upper end of the uprightsection gV by an elbow m. The

upright'section g is provided at its upper endY with a movc ble screwthimble or nipple m',

i which is provided with an internal screwthread engaging with anexternal thread on the pipe and with an external thread engaging with aninternal thread formed in the adjacent portion of the elbow l711-.

In assembling the parts the upper and lower horizontal sections g g2 arefirst attached to the valve-casing 'L' and the partition-plate b2, andthe T Z and elbow m are screwed upon the outer ends of said pipes. Theupright section g, which is made Vsomewhat shorter than the distancebetween the elbow and T, is then screwed to the latter, and the thimble,which has been previously screwed down upon the pipe g to admit itbetween the T and elbow, is now screwed upward on the pipe g and withits upper end into the elbow. This forms a very simple construction,which permits the parts of the blast-pipe to be readily connected anddisconnected for cleaning the same or for other purposes.

The tuyere F consists of a hollow annular shell or casing, the lowerpart n of which is preferably formed with the bottom plate of the hearthE, While the upper part n thereof is bolted to said lower part. Theupper part 'nis provided with a central discharge-opening o and with adepending annular flange or rim p, surrounding the opening 0, and whichprojects downwardly a short distance into the shell of the tuyere, so asto compel the blast to dive under said flange before escaping throughthe opening o, and thereby keep clean the interior of the tuyere andprevent accumulation of ashes in the saine.

q is a cup-shaped receptacle arranged within the tuyere directlyunderneath the dischargeopening o and separated from the dependingflange p by a narrow space, forming a passage for the blast. The cup qcatches any ashes falling through the discharge-opening 0, and

as soon as they are deposited in the cup they are blown out by theblast. The cup gis provided at its upper edge, in front ofV the passageh, with a guard or deflector o", which prevents the blast from escapingdirectly through the discharge-opening o and compels the same to passwholly around the cup before escaping, thereby causing the blast tocirculate through the entire inner portion of the tuyere and clearingall parts thereof. The cup q is provided on its under side with a stems, which is seated in a socket in the lower plate n of the tuyere, andthe cup is held from rising out of place by upwardly-proj ecting pins t,formed on the upper side of the cup q and bearing against the under sideof the top plate n of the tuyere l?.

The upper com'partment of the bellows is preferably compressed by meansof spiral springs U, interposed between the under side of thehearth-plate and the top plate Z) of the bellows.

I claim as my inventionl. In a forge7 the combination, with abellows-and a tuyere or blast-discharge nozzle, of a blast pipe orpassage connecting the bellows with said tuyere or discharge-nozzle, anda check-valve arranged in said passage, substantially as set forth.

2. ln a forge, the combination, with a bellows and a tuyere, of avalve-casing connected with said tuyere and provided with an inclinedway, a blast pipe or passage connecting said valve-casing with thebellows, and a check-valve arranged in the valve-Casin g upon saidinclined Way,'s'ubstantially as set forth.

8. In a forge, the combination, with the Y' Y tuyere and the bellowshaving a stationary partition b2, of a blast-pipe connecting the bellowswith the tuyere and provided with a horizontal branch or section g2,entering an opening in the flexible portion of the bellows and securedto the partition b2, and a block 7c, fitted over said pipe within thebellows and forming a support to which the flexible portion of thebellows surrounding the pipe is tacked, substantially as set forth.

4. In a forge, the combination, with the bellows and the tuyere, of thevalve-casing Zt and check-valve t', the blast-pipe G, connecting thebellows with said valve-casing andV composed of horizontal sections gg2, and an upright section g, a T Z, connecting the lower horizontalsection g2 with the lower end of the upright section g, an elbow m,attached to the outer end of the upper horizontal seotion C', and amovable screw thimble or nipple ym', attached to the upper end of theupright section gV and connecting the latter with the elbow m,substantially as set forth.

5. ln a tuyere for forges, the combination, with an annular shell orcasing provided in its top with a discharge-opening and in its side withan inlet-opening, of a depending flange or rim surrounding said opening,a cup or receptacle arranged within the annular casing underneath saiddischarge-opening IIO 1o i depending {iange p,and a @np or receptacle q,arranged Within the tnyerepasing underneath the discharge-opening oandprovided with a `stem seated in the socket of the lower part 'n ofthe tuyere, substantially as set forth.

Witness my hand this 12th day of Decem- 15 ber, 1888.r

CHARLES HAMMELMANN.- Vitnesses:

C. F. GEYER, C. D. HoWE.

